<form name="punchout_form" method="post" action="https://openapi-sandbox.dl.alipaydev.com/gateway.do?charset=utf-8&method=alipay.trade.page.pay&sign=V9cic6TeymK7IDHOt%2BCQ2C2sbWVvgwKHs4p2cMrcDFX42dU22631CqN0Y3JZbi8OfulCuDHTlafB3bYCwz7iiMG9kt7mmk3v%2BVUSMAyeWaIig9HKz0U7hJWPgaB6NVWjQl8aHCcDfQCtJz9A5dHYRgJC%2F1xEO%2FNFg0Ag%2FwPT3fbgIXPOwFM7Ma70JOMSLCdOdgVfPiEoBCCh89RBIcxfHHNNpxbJs8swjc3sdF3qo1ASSHhGPPnDyVN7HYtQqqMPMjLtxdYcMvelAtDSDdXCfku5LqRNrxZiW8Yzdb9rHMMz7AXsYh84c%2BiQJsImikex1CRh0ewULBQJbnBMiSze6g%3D%3D&return_url=https%3A%2F%2Fgaga.plus&notify_url=http%3A%2F%2Fn98aa6a8.natappfree.cc%2Falipay_notify_url&version=1.0&app_id=9021000135697558&sign_type=RSA2&timestamp=2025-09-07+18%3A51%3A33&alipay_sdk=alipay-sdk-java-4.38.157.ALL&format=json">
  <input type="hidden" name="biz_content" value="{&quot;out_trade_no&quot;:&quot;10518040637955&quot;,&quot;total_amount&quot;:&quot;6.13&quot;,&quot;subject&quot;:&quot;测试商品&quot;,&quot;product_code&quot;:&quot;FAST_INSTANT_TRADE_PAY&quot;}">
  <input type="submit" value="立即支付" style="display:none" >
</form>
<script>document.forms[0].submit();</script>